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【单选题】
以下代码的调试结果为? abstract class MineBase { abstract void amethod(); static int i; } public class Mine extends MineBase{ public static void main(String argv[]){ int[] ar = new int[5]; for(i = 0;i < ar.length;i++) System.out.println(ar[i]); } }A.
输出5个0
B.
错误:ar 未初始化就使用
C.
错误:Mine 必须定义为抽象的
D.
错误,i超出数组下标范围
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举一反三
【简答题】试样: 开针 71 针,废纱单边起口 5 转, 1×1 罗纹 10 转 ,翻针成纬 平 针 20 转,废纱 5 转封口下机。以 拍照的形式交作业,并用文字分析织物的卷边性。 2. 预习:加针(暗放针)、减针、过针、手摇横机注意事项(教材 29-32 页),看学习通小视频 .
【多选题】样本均值的两个基本性质是:?
A.
若称样本中的数据与样本均值的差为偏差,则样本所有偏差之和为0
B.
数据观察值与均值的偏差平方和最小
C.
样本均值等于观测值的中值
D.
样本均值等总体均值
【单选题】()is very important that you don't make any mistakes when you calculate those figures.
A.
That
B.
What
C.
It
【单选题】---- ______! There is a bus coming. ---- Thank you very much for telling me. You saved my life!
A.
Good luck
B.
Watch out
C.
Cheer up
D.
Well done
【单选题】You were very impolite to him, for ______ you should make an apology to him, I think,
A.
this
B.
which
C.
what
D.
that
【单选题】听力原文：W: You've got a new camera. It looks good and must be very expensive. M: It is good. But I got it for next to nothing. Q: What does the man mean about his camera? (19)
A.
He got the camera at a very low price.
B.
The camera is very expensive.
C.
The camera is worth nothing.
D.
He does not like the camera.
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